Submission #321906

#	Time	Username	Problem	Language	Result	Execution time	Memory
321906		tigicha	Stations (IOI20_stations)	C++17	100 / 100	1156 ms	1292 KiB

stations

#include<bits/stdc++.h>
using namespace std;
int fix[1005], l;
vector<int>vec[1005], labels;
void dfs(int x, int y){
	fix[x]=1;
	if(y%2==0){
		l++;
		labels[x]=l;
	}
	for(int i=0; i<vec[x].size(); i++)
	if(fix[vec[x][i]]!=1) dfs(vec[x][i], y+1);
	if(y%2==1){
		l++;
		labels[x]=l;
	}
}
std::vector<int> label(int n, int k, std::vector<int>u, std::vector<int>v){
	labels.clear();
	for(int i=0; i<n; i++)
	labels.push_back(-1);
	l=0;
	for(int i=0; i<n; i++){
		vec[i].clear();
		fix[i]=0;
	}
	for(int i=0; i<u.size(); i++){
		vec[u[i]].push_back(v[i]);
		vec[v[i]].push_back(u[i]);
	}
	dfs(0, 0);
	return labels;
}
int find_next_station(int s, int t, std::vector<int>c){
	if(s<c[0]){
	    if(t>s){	
			for(int i=0; i<c.size()-1; i++)
			if(t>c[i]) continue;
			else return c[i];
		}
		return c[c.size()-1];			
	}
	else{
		if(t<s){
			for(int i=c.size()-1; i>0; i--)
			if(t<c[i]) continue;
			else return c[i];
		}
		return c[0];
	}
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:11:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for(int i=0; i<vec[x].size(); i++)
      |               ~^~~~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:27:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for(int i=0; i<u.size(); i++){
      |               ~^~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |    for(int i=0; i<c.size()-1; i++)
      |                 ~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61